清华大学：周炳琨院士逝世，享年90岁

Core Viewpoint - The passing of Professor Zhou Bingkun, a prominent figure in laser and optoelectronics in China, marks a significant loss for the scientific community, as he contributed greatly to the field and education over his lifetime [1][3]. Group 1: Personal Background - Zhou Bingkun was born in 1936 and graduated from Tsinghua University in 1956, where he later became a faculty member [3]. - He was elected as an academician of the Chinese Academy of Sciences in 1991 and as an academician of the Third World Academy of Sciences in 2001 [3]. Group 2: Professional Contributions - Zhou served as the leader of the National 863 Program's "Optoelectronic Devices and Integrated Technology" expert group from 1987 to 1996, and held various significant positions in research institutions and committees [3][4]. - He was instrumental in the development of high-efficiency, long-lifetime, narrow-linewidth, and frequency-stable semiconductor laser-pumped solid-state lasers during his visit to Stanford University in the 1980s, which opened new avenues in solid-state laser technology [4]. - Zhou led research in information optoelectronics, achieving notable results in crystal fiber growth, optical fiber amplifiers, wavelength division multiplexing, and time division multiplexing optical communication technologies [4].